Kinmen four days and three nights in-depth tour

I have arranged a four-day and three-night trip to Kinmen. I have an early flight and a late return flight. I have to pay attention when renting a car and returning it. There are no duty-free products to shop at Kinmen Airport, and it closes after six o'clock. It is too late to take a flight. You will have to wait a while before boarding. Some scenic spots have guided tours and rest periods, so be careful. As for Oucao Beach and Jiangong Island, please pay attention to the tide to avoid not seeing what you want to see.